<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app">
    <input type="text" v-model="msg">
    <br>
    {{msg}}
    <div>
      <div>
        学校的名字： {{school.name}}
      </div>
      <div>
        学校的年龄： {{school.age}}
      </div>
    </div>
    <div>
      {{arr}}
    </div>
</body>

</html>